package shili;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.FileOutputStream;
import java.io.IOException;

public class Shili6 {
    public static void main(String[] args) throws TransformerException, ParserConfigurationException, IOException, SAXException {
        // 得到DOM解析器的工厂实例
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        // 从DOM工厂获得DOM解析器
        DocumentBuilder db = dbf.newDocumentBuilder();
        // 解析XML文档,得到一个Document对象,即DOM数
        Document doc = db.parse("src/shili/Shili2.xml");
        // 找到要删除的节点
        NodeList list = doc.getElementsByTagName("Brand");
        for (int i=0;i< list.getLength();i++){
            Element brandElement = (Element) list.item(i);
            String brandName = brandElement.getAttribute("name");
            if (brandName.equals("SAMSUNG")){
                brandElement.getParentNode().removeChild(brandElement);
            }
        }
        // 保存XML文件
        TransformerFactory transformerFactory = TransformerFactory.newInstance();
        Transformer transformer = transformerFactory.newTransformer();
        DOMSource domSource = new DOMSource(doc);
        // 设置编码类型
        transformer.setOutputProperty(OutputKeys.ENCODING,"UTF-8");
        StreamResult result = new StreamResult(new FileOutputStream("src/shili/SHili2.xml"));
        // 把DOM树转换为XML文件
        transformer.transform(domSource,result);
    }
}
